The primary difference between overhead and underground transmission lies in their physical placement and the equipment required.

• Overhead Transmission: This method uses conductors suspended by tall towers or poles. It is the most common form of long-distance transmission because it is generally more affordable to install and easier to maintain. However, overhead lines are more susceptible to weather-related outages (e.g., storms, ice) and require a large right-of-way. Ningbo Changshi specializes in manufacturing the OHTL wire cable conductor tension stringing equipment and overhead tools and accessories necessary for this type of construction.

• underground Transmission: This method involves laying insulated cables within trenches, tunnels, or conduits. It is often used in urban areas or environmentally sensitive regions where aesthetics and space are a concern. Underground systems are more resilient to weather but are significantly more expensive to install and repair due to the specialized nature of the work. Our company provides a complete suite of underground cable laying equipment and tools to support these complex projects.